keller-dorian



(No Model.) A. KELLER-OBI-ANl 5 Sheets-Sheet PANTOGRAPH ENGRAVINGMACHINE. No. 302,567. Patented July l29`i 1884.

#6291 erren- Y N. PETER; Pnuwutmmpher, wmnmon. D4 C.

(No Model.) 5 Sheets-Sheet 3.

A, KELLER-130mm.

PANTOGRAPH ENGRAVING MACHINE.

No.,3'02,56'7. Patented July-29, 1884."

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n. PETERS. mblilkqnpmr, wmngtw. 5.a.

(No Model.) 5 Sheets-Sheet 4. A. KELLER-DORIAN.

l PANTUGRAPH ENGRAVING MACHINE.

No. 302,56F7fg4 Pateflit'yw, 1884.

MM, gam@ l N. PETER Phaaufumognpm Wmingnm. u. C.

(No Model.) 5 sheets-sheen 5.

A.. KELLER-DORIAN. PANTOGRAPH ENGRAVING'MAGHINB.

Patented July 29, 1884.

N. ranas. Phowmnampw, wm'mgw". D. cl

"NITED STATES PATENT Fries.

PANTOGRAP-H ENGRAVlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 302,567, dated July 29,3.88%l

Application led April 22, 1884. (No model.) Patented in Germany August10, 1883, No. 26,291.

To all whom it may concern:

Be it known that I, ALBERT KELLE1-DO- RIAN, engraver, residing inMlhausen, Alsace,-German Empire, have invented new and usefulImprovements in Pantograph Engraving-Machines, (for which I haveobtained apatent in Germany, August 19, 1883, No. 26,291,) of which thefollowing is a specification.

My invention relates to pantographs for engraving printing rollers orplatesi. e., to apparatus serving to transfer a drawing, in reducedsize, to a metal roller or plate to be used in printing on cloth orother material. More especially, it has'reference to such apparatus ofthis kind in .which carriages traveling at a right angle to each otherare used 5 and the improvements consist in the means employed forconveying motion, reduced in a certain ratio, from one pair of carriagesto the other, and

for reversing the direction of motion of the en-V graving-point.

The invention is represented on the annexed iive sheets of drawings.

Figure l is a plan showing the main features of the invention, thelevers H and L being placed at an angle to the carriages. Fig. 2 is afront view of a colnplete apparatus carried out according to theinvention. -Fig. '3 is a side view thereof, and Fig. 4 a plan.v Figs. 4tand 4b are detail views of the device for reversing the motion of theengraving-point. Fig.` 5 is a sectionalview of a part of the apparatusdrawn to a larger scale. Fig. 6 is a sectional View showing a modifiedarrangement of the apparatus.

To the brackets B of the frame A of the apparatus is fixed a table, C,on which the drawing to be copied is placed. y

W is a roller covered with'a coat of etching- Varnish, which is toreceive the engraving.

g is the tracingpencil, and n, Fig. 1, the engraving-point. Of thelatter there may be two, as shown by Figs. 2 and 4, or even more. Thearrangement of the apparatus is such that all movements of the pencil gfrom the right to the left, or vice versa, which I shall -call thetransverse movements, are transferred in the same or in oppositedirection to the point or points n, while the movements toward and awayfrom the operator, or the longitudinal movements, cause a rotation ofthe roller W, which is carried by centers It. The pencil g is fixed to aslotted guide-bar, G, constituting a part of a carriage, F, mounted onwheels or rollers F', running in or upon ways on the carriage E, thesaid ways being formed by rabbets or grooves, or in other suitablemanner. The carriage E in its turn runs on wheels or rollers E' in or-upon stationary Ways D, Figs. 2 and 8, arranged at a right angle to theWays of the carriage F. lIn the slotted guide-bar G is amovableslideblock, pivoted at l to a lever, L, having its fulcrum at Z2, andengaging at Z', by means of a pivot, with aslide-block working in theslotted bar k. This bar forms part of a carriage, K, connected by itsarm k (see also Fig. LF) to the arm m of a carriage, M, having adjustably secured to it one or more saddles, N, each of which carries anarm with an engraving-point, n. Both carriages, K and M, which, whenconnected together as de scribed, may be considered as a singlecarriage, run by means of their respective wheels or rollers K and M inor upon stationary ways parallel to the ways of the carriage F. Thecarriage E is provided with a slotted bar, e, in which slides a block,pivoted at h to the le` ver H, turning on its fulcrum h2, and engagingat h by a pivot with a slide-block movable in the slotted bar i. Thisbar is fixed to a carriage, J, running upon the wheels or rollers J,which are guided by stationary ways arranged above the carriage E andparallel to the ways of this carriage. On tlie carriage J there is asaddle, P, adapted .to be slid lengthwise on the same, and to be securedthereto in the required position. To the said saddle are attached theends of a band of metal, Q, which is slung with its middle part aroundone end of the roller W, and which is stretched sufficiently tight toact on the roller by means of friction. Vhen the pencil g is moved, thetransverse component of its motion will be transferred by the carriage Fand the lever L to the carriages K and M and the engraving point orpoints a, the motion of n bearing to the transverse motion of gtheproportion of the length of the lever-arm ZZ Z to that of the entirelever extending from Z` Z.

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The longitudinal component of the motion of g is transferred by thecarriage E and the lever H to the carriage J and the metal band Q.,which latter consequently imparts to the roller W a rotative motion, theextent whereof, measured on the surface of the roller, is in proportionto the longitudinal motion of g as the length of the lever-arin h2 h isto the whole length of the lever extending from 71.2 7L. The pivots at hand Z', by which the levers H and L engage with the slide-blocks in theslotted bars i and k, respectively, are arranged to be shifted on thesaid levers in the manner shown in Figs. 2 and 6. The lengths of theleverarms h2 h and Z2 Z may thus be varied, and the proportion in whichthe design is reduced in size altered accordingly.

The band Q, is conducted over sheaves p2 and fixed with its ends to aslide,p, Fig. 5, guided between ways on the saddle P, and adjustable bya screw, p. This arrangement allows the roller to be turned by therequisite angle when a strip thereof has been iinished and the design isto be repeated. For the purpose of accurately determining the saidangle, a divided disk, S, Figs. 2 and 4, is placed loose on one of thecenters R, and connected wit-h the roller, while an indicatoris iixed tothe same center. The screw p3 serves to stretch the band Q to thenecessary degree. The centers B are carried by puppets arranged to beslid on and iixed to an axle, r, Figs. 2to 5, which is mounted in xedbearings, and adapted to be turned by a screw, r', gearing with a sectoron the said axle. By means of this mechanism the centers may be raisedand lowered simultaneously and uniformly, and the roller thereby adjusted at the proper height relatively to the band Q.

Vhen the two carriages K and M are rigidly connected together, as shownin Figs. l and 4, they will both move in conformity with each other andin the same direction as the carriage F. rFhey may, however, also bebrought in such relation to each other as to move in opposite directionsby means of the metal band o, Fig. 4. This band runs overguiding-sheaves O, and is attached at either end to an arm, m2, on thecarriage M, while in the middle it may be xed to the arm k2 of thecarriage K. In order to allow either connection between K and M to beestablished and broken with facility, the arm 7c', with which thecarriage K is provided, is pivoted thereto, so that it may be turnedover from the position of Figs. 4 and 4L into the position shown by Fig.413, and its end 7c3 iits between the two branches of the forked arm mon the carriage M. By means of regulating-screws ma the clear spacebetween thel said branches of the arm m may be adj usted to be inconformity with the thickness of the part 75s, and this part may be madeslightly tapering for attaining perfect contact with both screws m3.Moreover, for connecting the carriage K to the band o, the arm k2 isprovided with a clamping device consisting of the jaw-piece or` washer7a4 and screw with nut k, by which the band o may be clamped against theend of the arm k2. When the arm 7c is out of engagement with the arm m,and the two carriages are connected by the band o, the carriage M willmove in a direction contrary to that of the carriages K and F, and thedesign on the roller will be produced in inverted position, as com*pared with the pattern. It will be seen herefrom that the carriage M isof importance only for this special purpose, whereas when the design isnot to be inverted it may be left away, the engraving-point having thento be attached to the carriage K.

Fig. 6 shows a modified arrangement with two carriages M placed belowthe'carriagelJ, and each having one or more holders withengraving-points n acting on either side of the roller WV. Besides, inthis gure, the roller WV is supposed to be rotated by a friction-barattached to the carriage J, and acting with a roughened surface on adisk, T, secured to the roller, or keyed on an axle, w, on 'which theroller is placed. This arrangement is preferred for large rollers. Theaxle w may be mounted in bearings adjustable between the uprightbrackets a. When a plate is to be engraved, the carriage J is providedwith a table, to which the plate may be secured,while the parts servingto carry and rotate a roller are put out of operation. All the rest ofthe mechanism remains the same as before. The arms carrying theengraving points n are formed by levers pivoted to the saddles N, (seeFig. 5,) and so balanced that the points will act by gravity against theroller W". Vhen the points require to be lifted off the roller, the tailends of the levers are depressed by a rod, u, Figs. 2, 3, 4, and 5,carried by the lever-arms U on the kshaft fr, which is connected by thearm U', the lever U2, and suitable rods to the lever U3 of a pedal, u,the parts being so arranged that when the pedal is pressed down the baru will be raised, so as to allow the points n to bear on the roller,whereas on releasing the pedal the bar u will be depressed by a weightfixed on the lever U3, and the points n thereby raised.

For carrying out the shading 4of the drawing it is of advantage tohavefa second tracing-pencil, g', attached by an arm, G', t0 the bar G.Under this pencil plates are placed, in which are engraved thehatching-lines to be reproduced to a smaller scale, and while theoperator follows these lines with the pencil g he determinestheir lengthbythe motion of the pencil g on the pattern.

I claim as my invention# l. In a pantograph comprising the carriages E,F, J, and K, the tracing-pencil g, and engraving point or points n, andmeans for holding the surface to be engraved, and of imparting motionthereto by the carriage J, the combination,with the said carriages,ofthe levers H and L, transmitting motion from the carriages E and F tothe carriages J and K,

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respectively, substantially as and for the purl to carriage K, andadapted to engage with pose described. f arm m', and of the c1ampingdevice for con- 2. In a pantograph comprising the carnecting carriageKtotheband o, substantially 15 riages E, F, J, and K, levers H and L, andas and for the purpose specified. 5 means for rotatively supporting theroller, W, p In testimony wh ereof I have signed my name which is to beengraved, the combination, to this specification in the presence of twowith the carriage J, of the saddle I?, carrying subscribing Witnesses.

the metal band Q arranged to be slung around the roller W, as and forthe purpose described. I ALBERT KELLER DORIAN 1o 3. The combination,with the carriages K Witnesses: and M, band o, and sheaves O, of theforked HENRY SPRINGMANN,

arm m on carriage M, and the arm k, pivotcd B. ROI.

